The underlying data for the Guardian’s air pollution in Europe investigation is sourced from the Expanse project, coordinated by the Institute for Risk Assessment Sciences, Utrecht University, the Netherlands, with air quality modelling conducted in collaboration between Utrecht University and the Swiss Tropical and Public Health Institute.
The project employed various data sources, including road data, land use data, satellite air pollution retrievals, chemical transport model estimates and meteorological information, which were employed as input for the air quality modelling. The data, methodology and resulting interactive were shared with air pollution scientist Dr Gary Fuller for verification.
